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The Natural Philosopher[_2_] The Natural Philosopher[_2_] is offline
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Default Washine machine discharge pump - how fast?

On 09/06/16 13:09, Robin wrote:
On 09/06/2016 07:15, wrote:
On Thursday, 9 June 2016 06:59:42 UTC+1, harry wrote:
On Wednesday, 8 June 2016 21:34:02 UTC+1,
wrote:
We want to move our washing machine to a location in the house where
drainage will be difficult. We *could* run 50mm pipe round about 8m
of walls with some AAVs, but it seems more sensible to use a pump,
most likely a Grundfos Sololift2 C-3 unless anyone has anything to
say about it.

To get the right sizing of outlet pipe, we need to estimate the
inflow (too small, and the flow will be noisy, too large and the
flow will be too slow to self-clean).

Anyone have any idea even vaguely how fast a modern washing machine
pump chucks water out?

The pumping out is not a timed operation, the pump runs until the
machine is empty.


bzzt wrong answer



Can you expand on that please? I ask as on the few machines I've used
the pumps seemed to operate until the machine is "empty"[1], not for a
timed period. My main evidence for that is their behaviour (a) when
used on different cycles with different water levels; and (b) when used
to spin stuff put in wet, or to spin after being paused. In those circs.
the pump operated for a varying periods before starting the spin cycle,
not for a fixed time.

[1] taking empty to mean "negligible more water can be pumped"


I think wot e ment was that your answer whilst technically correct, was
not an answer to the question as posed.


--
Those who want slavery should have the grace to name it by its proper
name. They must face the full meaning of that which they are advocating
or condoning; the full, exact, specific meaning of collectivism, of its
logical implications, of the principles upon which it is based, and of
the ultimate consequences to which these principles will lead. They must
face it, then decide whether this is what they want or not.

Ayn Rand.